TY - RPRT TI - Geochemical analyses of ground-water ages, recharge rates, and hydraulic conductivity of the N aquifer, Black Mesa area, Arizona AU - Thomas J. Lopes AU - John P. Hoffmann PY - 1997 DO - 10.3133/wri964190 UR - https://pubs.usgs.gov/publication/wri964190 ID - wri964190 ER -